Microsoft fixes 55 vulnerabilities, 3 exploited by Russian cyberspies

Microsoft released security patches Tuesday for 55 vulnerabilities across the company’s products, including for three flaws that are already exploited in targeted attacks by cyberespionage groups.

Fifteen of the vulnerabilities fixed in Microsoft’s patch bundle for May are rated as critical and they affect Windows, Microsoft Office, Microsoft Edge, Internet Explorer, and the malware protection engine used in most of the company’s anti-malware products.